Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution

Sung Fu Hung, Zhi Zhong Chen, Chun Chih Chang, Chia Shuo Hsu, Ming Kang Tsai, Chia Cheng Kang, Hao Ming Chen

Research output: Contribution to journalArticle

Abstract

II–VI semiconductors exhibit unique behaviors that can generate dual-holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster-2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole-transfer at the surface and suppress the recombination. Different roles are enacted by light-holes and heavy-holes, in which the light-holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy-holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm−2 at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.

Original languageEnglish
Article number1704047
JournalSmall
Volume14
Issue number14
DOIs
Publication statusPublished - 2018 Apr 5

Fingerprint

Semiconductors
Photocurrents
Excitons
Semiconductor materials
Light
Photocatalysis
Hybrid materials
Conservation of Natural Resources
Lighting
Genetic Recombination
Sustainable development
Metals
Oxidation
Kinetics
Water
Electric potential
LDS 751

Keywords

  • cadmium selenide
  • light holes
  • nanoplatelets
  • photoelectrochemistry
  • photoelectrolysis

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

Hung, S. F., Chen, Z. Z., Chang, C. C., Hsu, C. S., Tsai, M. K., Kang, C. C., & Chen, H. M. (2018). Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution. Small, 14(14), [1704047]. https://doi.org/10.1002/smll.201704047

Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution. / Hung, Sung Fu; Chen, Zhi Zhong; Chang, Chun Chih; Hsu, Chia Shuo; Tsai, Ming Kang; Kang, Chia Cheng; Chen, Hao Ming.

In: Small, Vol. 14, No. 14, 1704047, 05.04.2018.

Research output: Contribution to journalArticle

Hung, SF, Chen, ZZ, Chang, CC, Hsu, CS, Tsai, MK, Kang, CC & Chen, HM 2018, 'Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution', Small, vol. 14, no. 14, 1704047. https://doi.org/10.1002/smll.201704047
Hung SF, Chen ZZ, Chang CC, Hsu CS, Tsai MK, Kang CC et al. Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution. Small. 2018 Apr 5;14(14). 1704047. https://doi.org/10.1002/smll.201704047
Hung, Sung Fu ; Chen, Zhi Zhong ; Chang, Chun Chih ; Hsu, Chia Shuo ; Tsai, Ming Kang ; Kang, Chia Cheng ; Chen, Hao Ming. / Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution. In: Small. 2018 ; Vol. 14, No. 14.
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